Upon inspecting a teacher, Umbridge could choose to place that teacher on probation, a power she used to great effect. She first placed Sybill Trelawney on probation and began inspecting all future lessons of hers, eventually dismissing her from her teaching post. Rubeus Hagrid was also placed under probation, though he escaped from Hogwarts and went into hiding, rather than allowing himself to be formally dismissed. Severus Snape was also briefly placed on probation after he stated to Umbridge that it would take a month for him to procure Veritaserum in order for her pursue her goal of interrogating Harry Potter. This period of probation lasted less than a day, however, as Umbridge was soon removed from her post as Hogwarts High Inquisitor.